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• Windows XP to Ubuntu 10.04 via VNC does not refresh

  - by hughdbrown

  I've tried tightvncserver and vnc4server on Ubuntu. I've tried tightvnc viewer and ultravnc viewer on Windows XP. I can connect from Windows to Ubuntu with any combination, but there is no screen refresh: I can drag a window on Ubuntu using my mouse in Windows or type into a terminal in Ubuntu from my keyboard in Windows, but the image does not change on Windows. I can request a screen refresh from Windows but the screen does not update. I am running the ATI driver on Ubuntu. I've tried stepping the System|Preferences|Appearance|Visual Effects down from Extra to Normal with no effect.

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• Causes of hard crashes on Windows XP and how to debug

  - by Sam Brightman

  I am occasionally seeing hard lockups on XP: totally unresponsive to keyboard/mouse, screen freezes at time of crash, no SSH/VNC possible. Very intermittent, nothing in the logs. I never see a blue screen on any kind of error message. This morning I logged in via VNC, logged out again, 20 minutes later physically sat at PC and it crashed around the time of VNC logout. I tend to suspect video cards in these kind of situations but it's a modern-ish card with modern drivers (one revision back, but this has been happening for 5 revisions or more) and normally would at least see a blue screen I expect. What would you suspect? Where can I look or what can I set up for more information? Bear in mind that this happens about once every 3 or 4 weeks, so extensive logging or intrusive monitoring isn't really an option.

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• 2 AudioQueue questions

  - by iter

  I am learning to use AudioQueue. I wish to generate an audio stream programmatically. I have 2 issues that I cannot account for. I am getting audio when I run in the simulator, but not on an iPhone. (Other apps do produce sound on the phone). I get about 20ms-long gaps of silence between buffers. In my testing, I generate an audio buffer on startup and repeatedly enqueue it without modification. I don't spend any processing on filling audio buffers at runtime, not even copying them. Ari.

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• EloTouch touchscreen suspends correctly but does not come out of standby on Ubuntu 10.04

  - by Ton van den Heuvel

  I am using an EloTouch touchscreen on a minimal Ubuntu 10.04 installation. I have a bare Xserver running without any desktop environment, just an xterm. The touchscreen is working great, but there is still one small problem. As soon as the touchscreen goes to standby, it is not coming out of standby when touching the screen. Using a keyboard or mouse does get it out of standby though. I am looking for any hints or directions to a cause of this problem. Is this an x.org configuration problem? A driver problem? Is this a known problem with touchscreens in general? Any pointers are welcome. The driver I am using is an unreleased EloTouch driver (3.5.0). I received it through a reseller who can not give me any technical information unfortunately.

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• setsockopt TCP_NODELAY question on Windows Mobile

  - by weki

  Hi all, I have a problem on Windows Mobile 6.0. I would like to create a TCP connection which does not use the Nagle algorithm, so it sends my data when I call "send" function, and does not buffer calls, having too small amount of data. I tried the following: BOOL b = TRUE; setsockopt(socketfd, IPPROTO_TCP, TCP_NODELAY, (char*)(&b), sizeof(BOOL)); It works fine on desktop. But on Windows Mobile, if I set this value, than I make a query for it, the returned value is 8. And the network traffic analysis shows that the nothing changed. Is there any way to force a flush to my socket?

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• Audio -- How much performance improvement can I expect from from reducing function calls by using bu

  - by morgancodes

  I'm working on an audio-intensive app for the iPhone. I'm currently calling a number of different functions for each sample I need to calculate. For example, I have an envelope class. When I calculate a sample, I do something like: sampleValue = oscilator->tic() * envelope->tic(); But I could also do something like: for(int i = 0; i < bufferLength; i++){ buffer[i] = oscilatorBuffer[i] * evelopeBuffer[i]; } I know the second will be more efficient, but don't know by how much. Are function calls expensive enough that I'd be crazy not to use buffers if I care event a tiny bit about performance?

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• OpenGL ES clarifying question regarding FBOs -- sorry can't find this info anywhere else?

  - by DevDevDev

  If I instantiate an FBO without binding a rendering buffer or a texture to it, what happens when I draw to it, nothing? Do I need to associate a rendering target (renderbuffer or texture) to have an FBO do anything? What I'm trying to do is precache some buffers and then merge them later, but that doesn't seem to work at all. Ideally I'd like to do something like glBindFramebufferOES(GL_FRAMEBUFFER_OES, fbo1); // Draw some stuff to fbo1 glBindFramebufferOES(GL_FRAMEBUFFER_OES, fbo2); // Draw some stuff to fbo2 // ... // ... // glRenderFbo(fbo1); -- Not a func // Set blending, etc. etc. // glRenderFbo(fbo2); -- Not a func

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• mingw32-make : "Input line too long" issue

  - by hjsblogger

  We have a Makefile which runs on a Windows 2003 machine and we are using mingw32-make for it. Since the Makefile has many include paths, it exceeds the buffer size of 8K that the cmd can handle [Ref - http://support.microsoft.com/kb/830473/EN-US/due to which the compilation results in "input line too long" issue. I wanted to know the following - What would be the best way to optimize the Makefile as I have already removed unwanted compiler switches, include paths etc. Is there any way we can put all the INCLUDE paths in one .txt file and import it in the Makefile.I could not find any mingw32 documentation for the same. Any other inputs/hints/reference links are most welcome. Thanks, -HJSblogger

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• iMac goes black, makes clicking sound... thoughts?

  - by Josh

  This is the second time this has happened. The display on my Apple iMac (20-inch Late 2006) just went black, system was completely unresponsive to mouse/keyboard input, I could not SSH into nor ping the machine, and it didn't show up in ARD. I could hear a fairly loud clicking noise from inside which sounded like the DVD drive trying to seek -- but there is no disc in the drive. It could possibly be the hard drive... I pressed the power button and the system powered off, and now will not power on again. Thoughts / suggestions as to next course of action?

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• Sharing output streams through a JNI interface

  - by Chris Conway

  I am writing a Java application that uses a C++ library through a JNI interface. The C++ library creates objects of type Foo, which are duly passed up through JNI to Java. Suppose the library has an output function void Foo::print(std::ostream &os) and I have a Java OutputStream out. How can I invoke Foo::print from Java so that the output appears on out? Is there any way to coerce the OutputStream to a std::ostream in the JNI layer? Can I capture the output in a buffer the JNI layer and then copy it into out?

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• Ubuntu installation does not recognize previous partitions

  - by Hawkcannon

  I have been attempting to install Ubuntu (10.04, Lucid Lynx) on my computer. I wasn't ready to take the pure-Linux plunge yet, so I reserved a partition on which I would install Ubuntu. I ran the installer and answered the 'minor' questions (keyboard layout, time zone, etc.), but had trouble when I reached the partitioning. I have several partitions, but Ubuntu only saw one of them, which was not the ext3 partition that I had set up. I tried deleting the partition in hope that the installer would find and utilize the empty space, but it only saw the original partition. I do not have an external hard drive to use, and I cannot clear any existing partitions. Am I running the installer incorrectly, or is there a more serious problem?

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• Ubuntu installation does not recognize previous partitions

  - by Hawkcannon

  I have been attempting to install Ubuntu (10.04, Lucid Lynx) on my computer. I wasn't ready to take the pure-Linux plunge yet, so I reserved a partition on which I would install Ubuntu. I ran the installer and answered the 'minor' questions (keyboard layout, time zone, etc.), but had trouble when I reached the partitioning. I have several partitions, but Ubuntu only saw one of them, which was not the ext3 partition that I had set up. I tried deleting the partition in hope that the installer would find and utilize the empty space, but it only saw the original partition. I do not have an external hard drive to use, and I cannot clear any existing partitions. Am I running the installer incorrectly, or is there a more serious problem?

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• External USB Fingerprint Reader for Pre-boot Authentication for Dell Laptop

  - by cop1152

  My company just purchased several Dell Latitude E6500 laptops with docking stations and external monitors. These laptops have a fingerprint scanner located next to the keyboard. DOCKED users who prefer to use the included fingerprint scanner for pre-boot authentication are forced to open their laptop in order to access the scanner. This is an inconvenience when the laptop is docked. We are looking for an external, usb fingerprint scanner, that will work with the current preboot authentication setup. I assume that this scanner would have to access the existing credentials for authentication....wherever they are stored. So we would require something that would work PRE-BOOT, use the existing credentials, and not interfere with usage when the machine was not docked, such as when the laptop is being used at home. Does anyone have experience with this scenario? Thanks.

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• Using Vim on the ipad... Any tips?

  - by pax1728

  I'm itching to program on my ipad. With the iSSH app I was able to log on to my university's server and even open an X server window. Unfortunately, the experience within iSSH is still rather clumsy. When using vim, the bottom line is hidden by the keyboard. Does anyone have any experience with SSH connections and the ipad or iphone? Are there better applications to use? I would prefer not to jailbreak my ipad.

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• Suspended Laptop Cannot Wake Up - Ubuntu

  - by Zack

  I've got an ASUS G73JH, and whenever I suspend it or hibernate it, it will not wake up. The screen stays backlight but is black. I can't: Awaken it with the keyboard Awaken it with the mouse Soft power-off by pressing the power button I have to hold down the power button and shut it down that way, and this seems a little unreasonable. Is there a place I could look for more detail as to what's causing this? Is there a known quick-fix to this issue?

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• Mac has become insanely slow : Processes SystemUIServer, UserEventAgent and loginwindow using a lot of memory

  - by SatheeshJM

  I have been using my Mac for for many months without any problem. But recently all of a sudden the Mac became insanely slow. I opened Activity Manager to see what was happening. For three processes SystemUIServer, UserEventAgent and loginwindow, the memory gradually increases and reaches upto 2 GB for each process. This completely hangs up my Mac. I tried the following : 1. Restart Mac 2. Restart Mac in safe mode 3. Manually kill the processes 4. Remove Date and Time from Menu bar(this was supposed to be the problem for the SysteUIServer process's memory according to many users) 5. Removed the externally connected keyboard and mouse(some had suggested this for UserEventAgent's memory) No luck with any of those. The moment I log in, the memory spikes up. Any idea what the hell is happening? Please help.

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• IOGEAR KVM cannot reset admin account

  - by George Horlacher

  According to the manual you can do a cold reset by holding the reset button in for 3 seconds. This does seem to reset it but the username and password are not reset... I've tried the keyboard hotkeys - Num-Lock and minus sign (-) to get into hotkey mode and then use the "r" and "" to reset to factory defaults but that doesnt seem to do anything either. It just reverts to User1. I'm not sure what the default admin username should be but admin doesnt seem to work I need to get to the admin menu to name the ports but cannot get access. Any ideas? Using GCS1758 manual with no luck.

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• Remote Desktop with resource sharing

  - by Malfist

  I recently removed ubuntu from my laptop and installed Windows 7 because Microsoft's DreamSpark program gave me Visual Studio Pro for free and I want to do some C# programming with it. The problem is that my laptop's screen is small, it's resources are extremely limited, and it doesn't have a full sized keyboard. However, I do have a desktop that is my primary system, and it's got a quadcore and tons of RAM in it, and dual monitors. My question is this, is there a way I can use a program from my laptop, on my desktop, and share my desktops CPU and RAM with the laptop? Everything is connected through a 100 MB/s switch. One caveat, my desktop is running ubuntu.

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• My Mac is slow but don't know what's slowing it down

  - by duality_

  My Mac (Macbook Pro) is sometimes slow doing basic tasks, like browsing the web or something like that. If I open Activity Monitor, I have (maybe) one program that is about 10 % CPU, others are below 1 %. My CPU usage is not full. I still have more than 2 GB of free memory (out of 5 GB). There is no heavy I/O activity like copying files. My open programs are Google Chrome (6 tabs, none of which are in some way (flash, many DOM objects, Javascript) have IMO, except maybe Gmail), Activity Monitor, Finder, Sublime Text 2 (text editor) and iTerm (terminal). What is causing the slowdown? "Slow" being: taking time to write these characters (I press the keyboard keys but there is a delay before I see them on the screen), changing tabs or programs, etc.

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• How to replace emacs keybindings with vim keybindings in OS X GUI-level text fields

  - by post meridiem

  I'm fairly fluent with VIM, but find myself having to use GUI programs (in OS X) and their awkward editing modes more and more frequently for my work. I know that OS X lets you use basic emacs keybindings in most textfields (browser window/bar, etc.). I'm wondering if it's possible to switch the emacs keybindings to vim keybindings for those GUI-level input areas. I understand that it might be possible to do that key-by-key in the keyboard layout preference pane. But that approach seems limited, cumbersome, and not very elegant. I'm thinking--and I may well be wrong here--that since OS X already ships with VIM installed, there should be a way to change a preference file deep in the system that maps VIM instead of emacs keybindings to the GUI text/input areas. Does anyone know if this is a) theoretically possible, or if there's something about how OS X maps emacs keybindings to its GUI interface that would make this impossible; and b) how/where that could be done?

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• Should I use uint in C# for values that can't be negative?

  - by Johannes Rössel

  I have just tried implementing a class where numerous length/count properties, etc. are uint instead of int. However, while doing so I noticed that it's actually painful to do so, like as if no one actually wants to do that. Nearly everything that hands out an integral type returns an int, therefore requiring casts in several points. I wanted to construct a StringBuffer with its buffer length defaulted to one of the fields in that class. Requires a cast too. So I wondered whether I should just revert to int here. I'm certainly not using the entire range anyway. I just thought since what I'm dealing with there simply can't be negative (if it was, it'd be an error) it'd be a nice idea to actually use uint. P.S.: I saw this question and this at least explains why the framework itself always uses int but even in own code it's actually cumbersome to stick to uint which makes me think it apparently isn't really wanted.

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• Stop taskeng.exe window from popping up

  - by BlaM

  I have several processes scheduled in my Windows 7 environment, mainly for backups, that are supposed to run in the background. However instead of just doing it's work quietly in the background, the task scheduler pops up a black (console like) "taskeng.exe" window. The window goes in front of all other windows. Luckily it doesn't steal my keyboard focus, but it blocks the view on everything. Is there a way to avoid this window - or at least have it appear in the background without stealing my VISUAL focus?

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• Explorer forgetting how to cut and paste files

  - by raimesh

  My Windows XP (SP3) machine (at work) occasionally "forgets" how to cut-and-paste files in Explorer - if I cut or copy a file then go to paste it elsewhere, the "paste" and "paste shortcut" menu items are greyed out. The keyboard shortcuts (Ctrl+X/Ctrl+C,Ctrl+V) don't work either, and neither does Drag-and-Drop - clicking and dragging a file/folder doesn't change the pointer and letting go doesn't drop the item anywhere. Restarting the explorer.exe process usually fixes the problem, but sometimes I need to do a full reboot. Note: this may be related to the following existing question, although that's Vista and it sounds like the asker has more permanent problems than I do: http://superuser.com/questions/27045/copy-paste-in-vista-explorer-broken-not-ms-vpc So, any idea what might be causing the problem and how to avoid it?

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• Is writing to a socket an arbitrary limitation of the sendfile() syscall?

  - by Sufian

  Prelude sendfile() is an extremely useful syscall for two reasons: First, it's less code than a read()/write() (or recv()/send() if you prefer that jive) loop. Second, it's faster (less syscalls, implementation may copy between devices without buffer, etc...) than the aforementioned methods. Less code. More efficient. Awesome. In UNIX, everything is (mostly) a file. This is the ugly territory from the collision of platonic theory and real-world practice. I understand that sockets are fundamentally different than files residing on some device. I haven't dug through the sources of Linux/*BSD/Darwin/whatever OS implements sendfile() to know why this specific syscall is restricted to writing to sockets (specifically, streaming sockets). I just want to know... Question What is limiting sendfile() from allowing the destination file descriptor to be something besides a socket (like a disk file, or a pipe)?

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• In windows 7, how do I disable "Ease of Access" pop ups on the logon screen as I am typing my passwo

  - by Silfheed

  Heyas So the question is pretty much in the title. Things to note: 'Use On-Screen Keyboard' is un-checked I have disabled Ease of Access by replacing utilman.exe But my problem now is that when I'm typing my password, It'll stop all together on the 'u' or the 'p' character and I have to click on the ease of access button then move focus back to the password to continue. Yes, one obvious solution is to not use a password that has 'u' or 'p' in it (which I've done), but that's obviously not a completely satisfying answer. Thanks! I feel a tumbleweed badge...

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